Question

Пример 1/15+2/45+7/15

Answer 1

1/15+2/45+7/15= 3/45+2/45+21/45=26/45

Answer 2

$\frac{1}{15} + \frac{2}{45} + \frac{7}{15} = \frac{8}{15} + \frac{2}{45} = \\ \\ = \frac{8*3}{15*3} + \frac{2}{45} = \frac{24+2}{45} = \frac{26}{45}$